FIELD: oil and gas industry.
SUBSTANCE: device for acoustic effect on productive formation includes hollow housing. Housing cavity is a vortex chamber with inlet tangential and outlet axial channels. Side walls of housing are designed with at least two emitters. Each emitter is an anechoic chamber with two necks for hydraulic connection to cavity of vortex chamber. Emitters are designed unlike by dimensions of cambers and/or necks for forming frequencies with different sizes by mentioned emitters and at the same time of close to frequency of free vibrations of casing string in circumferential direction in productive formation interval. At that emitter emission frequency is at least four times more than emission frequency of vortex chamber.
EFFECT: improving efficiency of effect on productive formation by means of generation of low-frequency vibrations outside a well in productive formation with simultaneous increase of the vibrations amplitude.
1 cl, 1 dwg
